I run frogs on everything. I've got a pair which is still going strong after 5 years of daily use including boston winters.
There's a grease port which makes servicing easy- just squirt some new grease in ther every month or two.
Seriously, i want every part of my bike to include this feature now.
The cleats last me ~1.5-2 years/pair.
Also, it's basically impossible to pull out of them while skidding.